Drum condition of safety capacitor

Safety capacitors refer to safety capacitors that do not cause electric shock after the capacitor fails, and do not endanger personal safety. Safety capacitors are typically only used for filtering in anti-jamming circuits. They are used in the power supply filter to filter the power supply and filter the common mode and differential mode interference respectively. For safety reasons and EMC considerations, it is recommended to add a safety capacitor at the power inlet.

Sometimes when you encounter a safety capacitor strike, it will be irritating. At this time, we can't beat the electric appliance because it may make the electrical damage more serious... This time we should open it and see the safety inside. What is the capacitor? Let me talk about the drums of the safety capacitors.

Safety capacitors drum belly. It is normal for a capacitor to expand and contract with temperature, but when a partial discharge occurs inside the capacitor or the insulation is broken down, some people will continue to use the method of reducing the voltage. However, because the internal breakdown will continue to generate arcs, which will make the volume expand and cause the capacitor to explode. This is very dangerous. Therefore, the "bulk" capacitor should be immediately withdrawn and replaced with a new safety capacitor.